RetryLimitHashedCredentialsMatcher.java

package cn.songjhh.project.util;

import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.ExcessiveAttemptsException;
import org.apache.shiro.authc.credential.HashedCredentialsMatcher;
import org.apache.shiro.cache.Cache;
import org.apache.shiro.cache.CacheManager;

import javax.lang.model.element.Element;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * Created by song9 on 2017/1/2.
 */
public class RetryLimitHashedCredentialsMatcher extends HashedCredentialsMatcher {

    private Cache<String, AtomicInteger> passwordRetryCache;

    public RetryLimitHashedCredentialsMatcher(CacheManager cacheManager) {
        passwordRetryCache = cacheManager.getCache("passwordRetryCache");
    }

    @Override
    public boolean doCredentialsMatch(AuthenticationToken token,
                                      AuthenticationInfo info) {
        String username = (String) token.getPrincipal();
        // retry count + 1
        AtomicInteger retryCount = passwordRetryCache.get(username);
        if (retryCount == null) {
            retryCount = new AtomicInteger(0);
            passwordRetryCache.put(username, retryCount);
        }
        if (retryCount.incrementAndGet() > 5) {
            // if retry count > 5 throw
            throw new ExcessiveAttemptsException();
        }

        boolean matches = super.doCredentialsMatch(token, info);
        if (matches) {
            // clear retry count
            passwordRetryCache.remove(username);
        }
        return matches;
    }

}